Frederick mayo



(No Model.)

1E. MAYO. Millstone Driver.

Patented May 24, 188i.

INVENTOR ATTORNEYS.

WITNES ES:

UNITED STATES PATENT OFFICE.

FREDERICK MAYO, OF ZANESVILLE, OHIO, ASSIGNOR TO HIMSELF AND FRANK J. KORTE, OF SAME PLACE.

MILLSTONE-DRIVER.

SPECIFICATION forming part of Letters Patent No. 242,698, dated May 24, 1881,

Application filed June 19, 1880. (N0 model.)

To all whom it may concern:

Be it known that I, FREDERICK MAYO, of Zanesville, in the county of Muskinguin and State of Ohio, have invented new and useful Improvements in Millstone-Drivers, of which the following isa specification. K

Figure 1 is a bottom view of my invention detached from the spindle and stone. Fig. 2 is a vertical view of the same, partly in section, in place on the spindle.

Similar letters of reference indicate corresponding parts.

Much difficulty has been experienced in running millstones from backlash from the face of the stones getting out of relative position, and consequently irregular grinding. To overcome these difficulties is the principal object of my improvements.

My invention consists in a millstone-driver having arms with adjustable springs, to compensate for backlash, to prevent irregularities in the running ofthe stone and insure the best results otherwise.

In the form of construction shown the driver has three arms, 13 O D, projecting from a center piece, E, having mortise a adapted to the shoulder 11 on the spindle F. Each of the arms has a top spring, 0, bolted or otherwise secured to the arm, and adjustable by set-screw d. Each of the arms also has a side spring, 6, adjustable by set-screw f. The bail also has three arms, G H I, projecting from a center piece, K, having a recess, 9, corresponding with and to rest kept adjusted by the arms and top springs,

and the backlash can be counteracted by the arms and side springs.

The details of construction can be varied within the scope of my improvements. The arms G H I may curve inward and the adjusting-screws d be tapped into said arms, as shown by dotted lines.

I am aware that it is not broadly new to take up the backlash with side springs where the stone is held in horizontal position simply by gravity; but I find that gravity alone does not attain this object when the stone is in mo tion, and for this reason I have employed the top springs, 0, arranged as above described.

What I claim as new and of my invention 1s- The top springs, 0, combined with the arms B G D, having intermediate springs, e, and arms G H I, having caps or recesses 'i, all arranged in a millstone-driver, as and for the purpose specified.

FREDERICK MAYO.

Witnesses:

HENRY L. KORTE, G, ARTHUR. 

